20873720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{587}}^1$

素因数の和:732

約数の個数: 64

約数和(自身を含む): 54190080

約数和(自身を除く): 33316360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 127, 140, 254, 280, 508, 587, 635, 889, 1016, 1174, 1270, 1778, 2348, 2540, 2935, 3556, 4109, 4445, 4696, 5080, 5870, 7112, 8218, 8890, 11740, 16436, 17780, 20545, 23480, 32872, 35560, 41090, 74549, 82180, 149098, 164360, 298196, 372745, 521843, 596392, 745490, 1043686, 1490980, 2087372, 2609215, 2981960, 4174744, 5218430, 10436860, 20873720]

約数ペア:

[(1, 20873720), (2, 10436860), (4, 5218430), (5, 4174744), (7, 2981960), (8, 2609215), (10, 2087372), (14, 1490980), (20, 1043686), (28, 745490), (35, 596392), (40, 521843), (56, 372745), (70, 298196), (127, 164360), (140, 149098), (254, 82180), (280, 74549), (508, 41090), (587, 35560), (635, 32872), (889, 23480), (1016, 20545), (1174, 17780), (1270, 16436), (1778, 11740), (2348, 8890), (2540, 8218), (2935, 7112), (3556, 5870), (4109, 5080), (4445, 4696)]